1.

The wavelength lambda_(e )of an electron and lambda_(p) of a photon of same energy E are related by

Answer»

`lambda_p prop lambda_e`
`lambda_p prop sqrtlambda_e`
`lambda_p prop 1/sqrtlambda_e`
`lambda_p prop lambda_e^2`

Solution :DE broglie wavelength of ELECTRON , `lambda_e=h/sqrt(2mE)`
`therefore`i.e. `lambda_e prop 1/sqrtE RARR lambda_e^2 prop 1/E` …(1)
de-Broglie wavelength of PROTON
`lambda_p=(hc)/E`
`lambda_p prop 1/E` …(2)
From (1) and (2)
`lambda_e^2 prop lambda_p` i.e., `lambda_p prop lambda_e^2`


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